Question

Marvin made some candles that each weighed 3/4 pound. He shipped them in a box that weighed 3 pounds. The total weight of the box filled with candles was 12 pounds. How many candles did Marvin ship in the box?

Answer 1

total weight = 12
weight of box =3
12 - 3 = 9 lbs of candles
So how many times does .75 or 3/4 go into 9? 
9/.75= 12, so 12 candles were shipped

Answer 2

12 candles were shipped. x × 3/4 = 9 + 3.
X = 12